New composition with enhanced luminescence
一种组合物、混合物的技术,应用在发光材料、分拣、印刷等方向,能够解决不足以提供成本/效率比、不提供长期化学稳定性等问题
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Embodiment 1
[0092] According to the above general procedure to prepare the chemical formula M 2(1-y-z) Yb 2y Rem 2z ADO 5-x Hal 2x A composition wherein M=Y, Rem=Er, A=Ba, D=Zn, Hal=F, y=0.12, z=0.035 and x=0 or x=0.1. With the aid of a 980nm laser diode at 1.5W / cm 2 The upconverting emission spectrum of the composition was recorded after excitation at a power density of .
[0093] figure 1 The up-converting (UC) emission spectrum of the composition from 500 to 700 nm is shown (dashed line: x=0; solid line: x=0.1). Compositions of the invention (x=0.1 ) showed increased UC emission intensity observed at 674 nm. figure 1 It is clearly shown that by partially substituting oxygen with fluorine, the UC emission intensity is significantly increased compared to prior art compositions (where x=0).
Embodiment 2
[0095] According to the above general procedure to prepare the chemical formula M 2(1-y-z) Yb 2y Rem 2zADO 5-x Hal 2x A composition wherein M=Y, Rem=Er, A=Ba, D=Zn, Hal=F, z=0.07, x=0.1 and y is variable. With the aid of a 980nm laser diode at 1.5W / cm 2 The upconverting emission spectrum of the composition was recorded after excitation at a power density of .
[0096] figure 2 The effect of Yb content on the green / red ratio in the up-converting (UC) emission spectra of compositions with variable y is shown. UC red emission intensity was observed at 674 nm and UC green emission intensity was observed at 548 nm. figure 2 It clearly shows that the red / green ratio can be tuned by the Yb content.
Embodiment 3
[0098] According to the above general procedure to prepare the chemical formula M 2(1-y-z) Yb 2y Rem 2z ADO 5-x Hal 2x The composition, wherein, M=Y, A=Ba, D=Zn, Hal=F, y=0.12, z=0 and x=0 or x=0.1. The downshifted emission spectrum of the composition was recorded after excitation by means of a 940 nm laser (see image 3 ; dotted line: x=0; solid line: x=0.1). image 3 showed that the downshifted emission could be enhanced by partial substitution of oxygen with fluorine.
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